Rotary die head



A. F. BREITENSTEIN.

ROTARY DIE HEAD.

Feb, 27, 19236 2 SHEETS-SHEET 2.

FILED FEB. 13, 1922.

Feb, 27, 192

r. BnErTENsTnrN, on NEW HAVEN, CONNECTICUT, assrenon TO THE GEOME'IBIC T001. 00., or NEW HAVEN, CoNNnCTrcUT, a Conronn'rroN.

ROTARY DIE HEAD.

Application filed February 13, 1922. Serial No. 536,116.

2'0 (.(ZZ whom may concern:

Be it known that I, ALBERT F. BREITEN- seem, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Die Heads; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, i and which said drawings constitute part of this application, and represent, 1n-

1 1 a view in side elevation of an automatic rotary die-head constructed in accordance with my invention.

Fig. 2 a view thereof in front elevation. 33 a rear view thereof.

1 a view thereof in central longitudinal section on the line d,-1 of Fig. 2.

1* 5 a view thereof in transverse section on the line 55 of Fig. 4.

detached perspective view of the zip 'ocatable operating-ring.

My invention relates to an improvement in automatic rotary die-heads, the object being to produce a simple, compact, efficient and durable instrument constructed with particular reference to reducing the number of parts to the minimum.

With these ends in view, my invention consists in a rotary automatic die-head characterized by having the means employed for locking the chasers in their closed positions directly engaged and operated by the reciprocatable operating-ring of the device.

My invention further consists in certain details of construction and combinations of parts as will be hereinafter described and particularly pointed out in the claims.

in carrying out my invention, as herein shown, I employ a reciprocatable operatingring 10, mounted upon a retaining-ring 11, which is mounted, as usual, upon the diehead body 12 and held against rotation thereon by a key 13. The said ring is formed upon its forward edge with two forwardly-projecting lugs 14 having cam-surfaces co-acting with anti-friction rolls ring upon studs 17 projecting from opposite races of a cam-ring 18, which has limited oscillating movement upon the diehead body 12 near the forward end thereof. The said lugs 14 are provided upon their inner faces with keyways 19 receiving keys 2O located upon the periphery of the retainingrlng 11, whereby the ring 10 is prevented from rotation thereupon but permitted to reclprocate.

When the operating-ring 10 is moved out ward with respect to the die-head structure, the said cam-surfaces 15 of the lugs 14 of the r ng 10 co-act with the rolls 16 on the studs 11 to turn the cam-ring 18 counter-clockwise, whereby the segmental cam-lugs 21, projectlng from its forward edge into transverse grooves 22in the rear edges of the chasers 23, move them radially inward into their closed or cutting positions in the ordinary manner, the said Chasers being located in radial grooves 2d formed in the end of the die-head body 12. The described counter clockwise or closing movement of the camring 18 effects the compression of a helical chaser-opening spring 25, located in an annular recess or channel26 in the rear edge of the cam-ring 18. The said channel 26 also receives a locking-segment 27 carrying a forwardly-projecting pin 28, the opposite faces of which are enga ed by the inner ends of adjusting-screws 29 tangentially mounted in the ring 18, and employed for adjusting the Chasers, according to the requirements of the work to be done, the pin 28 passing through a slot 28' in the ring 18. The said spring abuts at one end against a stoppin 30, projecting into the channel 26 from the retaining-ring 11, while the opposite end of the spring abuts against one end of the segment 27.

F or locking the chasers in their closed and, therefore, cutting positions, against the tendency of the spring 25 to move them into their open positions, I employ a springactuated lockingbolt 31, the head 32 of which projects into the annular recess 26 in position to engage with the locking end of the segment 27. The said bolt 31 is located in a bushing 33 set into a bore 3 1 formed in the retaining-ring 11 and extending through the same from edge to edge. the said bushing 33 receiving a helical spring exert a constant effort to move the bolt 31 and i s head 32 into its locking position, in which the said head engages with the locking end of the segment 27. as already described.

To provide for the automatic opening of the chasers 23 by the spring 25, the lockingbolt 31 is provided at its rear end with a radially projecting tripping finger 36, se-

cured in place by a pin 37 and adapted to have its inner edge directly engaged by a hardened pin 38 located in the bottom of a recess 39 in the rear face of the reciprocatable operating-ring 10, so that, when the same is engaged, in the usual manner, by an obstruction iorming a part of the machine in which the die-head is used, and the said ring 10 is thus forced to move rearwardly with respect to the die-head structure, the pin 38 engages directly with the finger 36 r and retracts the bolt 31 against the tension of the spring 85, whereby the head 32 of the bolt is disengaged from the locking end of the segment 27 and the chaser-opening spring 25 allowed to act through the segment 2? in turning the cam-ring clockwise, and so move the several chasers 23 radially outward away from the work into their open positions.

The cam-ring 18 is held in place against rearward displacement by the forward edge of the retainingring 11, which in turn is held against displacement upon the diehead body 12, by means of a shank-bushing 4E0 threaded upon the body 12 and secured theretoby a set-screw d1.

It will thus be seen that under my inven tion, the unlocking of the chasers is eii'ected by the direct engagement of the reciprocatable operating-ring, with the locking bolt employed to hold the chasers in their closed or cutting positions.

I claim: l

. 1. In a rotary die-head, the combination with the body and chasers thereof, of a reciprocatable annular operating-ring by the movement of which in one direction the chasers are moved inward into their closed positions, and locking means adapted to hold the chasers in their said closed posi-.

tions, and operated directly by the said ring for releasing the chasers and permitting them to be automatically 'moved outward into their open. positions.

2. In a rotary die-head, the combination with the bodyand chasers thereof, of a cam ring coacting with the chasers for moving them into their open and closed positions, an operating-spring for turning the said cam-ring in the direction of opening the chasers, a. reciprocatable operating-ring coacting with the said cam-ring for turning the same in the direction of closing the chasers, against the tension of the said spring, and a locking-bolt for holding the cam-ring in its closed position, and adapted to be directly engaged by the said reciprocatable ring for releasingthe cam-ring to the an tion of the said spring.

3, In an automatic rotary lie-head,the combination with the body and chasers thereof, of a cam-ring co-acting with the chasers for moving them into their open and closed positions, an operating-spring for turning the said cam-ring in the direction for opening the chasers, a retaining-ring, a reciprocatable operating-ring mounted upon the retaining-ring and co-operating with the camring for turning the same in the direction of closing, against the tension of the'said spring, and a locking-bolt mounted in the said retaining-ring in position to be acted upon directly by the said operating-ring for releasing the cam-ring to the action or": the said spring.

4C. In an automatic rotary die-head, the. combination with the body and chasers thereof, of a cam-ring co-acting with the chasers for moving them into their open and closed positions, a retaining-ring abutting against the said can1-ring, an operating ring co-acting with the cam-ring for turning the same in the direction for closing the chasers against the tension of the said operating-spring and reciprocatably mounted upon the retaining-ring, a springactuated locking bolt mounted in the retaining-ring and adapted at one end to hold the camring in its position of closing the chasers, and an operating-lug carried by the said lockingbolt and adapted to be directly engaged by the operating-ring for retracting thevbolt and releasing the cam-ring for being turned by the'said spring.

In testimony whereof, I have signedthis 

